阅读说明：本技术 一种风力发电机的主轴热处理工艺 (Heat treatment process for main shaft of wind driven generator ) 是由 邹福生 于 2020-04-16 设计创作，主要内容包括：本发明公开了一种风力发电机的主轴热处理工艺,热处理工艺包括以下顺序步骤：S1：调质,将主轴置入加热装置加热后保温,之后将主轴置入调质淬火液快速冷却,再进行高温回火,然后取出将之静置于空气中自然冷却。S2：高频淬火：将所述主轴通过感应加热设备进行表面加热,加热温度为900℃-1000℃,后将之置入恒温淬火池中,所述主轴在淬火池中冷却时间为10min-15min。S3：低温回火：将主轴加热至180℃-230℃,保温1.5h-2h后静置于空气中自然冷却采用本发明的热处理工艺制备的风力发电机的主轴,能够降低热处理工艺的成本,并且在相同的材质以及加工精度的条件下,能够极大的提高主轴的使用寿命。(The invention discloses a heat treatment process for a main shaft of a wind driven generator, which comprises the following steps in sequence: s1: tempering, namely putting the main shaft into a heating device for heating and then preserving heat, then putting the main shaft into tempering quenching liquid for rapid cooling, then carrying out high-temperature tempering, and then taking out and standing in the air for natural cooling. S2: high-frequency quenching: and (2) heating the surface of the main shaft by induction heating equipment at the heating temperature of 900-1000 ℃, and then placing the main shaft into a constant-temperature quenching bath, wherein the cooling time of the main shaft in the quenching bath is 10-15 min. S3: low-temperature tempering: the main shaft of the wind driven generator prepared by the heat treatment process is heated to 180-230 ℃, kept warm for 1.5-2 h and then placed in the air for natural cooling, so that the cost of the heat treatment process can be reduced, and the service life of the main shaft can be greatly prolonged under the conditions of the same material and processing precision.)

1. A heat treatment process for a main shaft of a wind driven generator is characterized in that: the heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: placing the main shaft into a heating device to be heated to 650-700 ℃, preserving heat for 40-50 min, and then placing the main shaft into quenching and tempering liquid to be rapidly cooled;

2) high-temperature tempering: heating the main shaft to 500-540 ℃, preserving heat for 1.2-2 h, taking out, standing in the air, and naturally cooling;

s2: high-frequency quenching: heating the surface of the main shaft by induction heating equipment at 900-1000 ℃, and then placing the main shaft into a constant-temperature quenching bath, wherein the cooling time of the main shaft in the quenching bath is 10-15 min;

s3: low-temperature tempering: heating the main shaft to 180-230 ℃, preserving heat for 1.5-2 h, standing in the air and naturally cooling.

2. The heat treatment process for the main shaft of the wind driven generator as claimed in claim 1, wherein: the heating device is a box-type resistance furnace.

3. The heat treatment process for the main shaft of the wind driven generator as claimed in claim 1, wherein: the quenching and tempering liquid is water-soluble.

4. The heat treatment process for the main shaft of the wind driven generator as claimed in claim 1, wherein: the quenching medium in the quenching tank is water-based quenching liquid.

5. The heat treatment process for the main shaft of the wind driven generator as claimed in claim 1, wherein: after the air in the step S3 is naturally cooled, the method also comprises a water cooling step, wherein polyethylene glycol, polyacrylamide and sodium chloride with the mass percentage of 5-6 wt% are added into the water in the water cooling process.

6. The heat treatment process for the main shaft of the wind power generator as claimed in any one of claims 1 to 5, wherein: the heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: placing the main shaft into a heating device to heat to 650 ℃, preserving heat for 40min, and then placing the main shaft into quenching and tempering liquid to rapidly cool;

2) high-temperature tempering: heating the main shaft to 500 ℃, preserving heat for 1.2h, taking out, standing in the air, and naturally cooling;

s2: high-frequency quenching: heating the surface of the main shaft by induction heating equipment at 900 ℃, then placing the main shaft into a constant-temperature quenching bath, and cooling the main shaft in the quenching bath for 10-15 min;

s3: low-temperature tempering: heating the main shaft to 180 ℃, preserving heat for 1.5h, standing in the air and naturally cooling.

7. The heat treatment process for the main shaft of the wind power generator as claimed in any one of claims 1 to 5, wherein: the heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: placing the main shaft into a heating device to heat to 675 ℃, keeping the temperature for 43-5 min, and then placing the main shaft into quenching and tempering liquid for rapid cooling;

2) high-temperature tempering: heating the main shaft to 520 ℃, preserving heat for 1.5h, taking out, standing in the air, and naturally cooling;

s2: high-frequency quenching: heating the surface of the main shaft by induction heating equipment at 925 ℃, then placing the main shaft into a constant-temperature quenching bath, and cooling the main shaft in the quenching bath for 10-15 min;

s3: low-temperature tempering: heating the main shaft to 200 ℃, preserving heat for 2 hours, standing in the air and naturally cooling.

Technical Field

The invention belongs to the technical field of heat treatment, and particularly relates to a heat treatment process for a main shaft of a wind driven generator.

Background

The traditional fuel energy is decreasing day by day, and the harm to the environment is increasingly prominent. At this time, the focus of attention of people in the world is the clean energy with its unique advantages. Wind is an energy source without public nuisance, the wind power generation is very environment-friendly, and the generated electric energy is very huge, so that more and more countries pay more attention to the wind power generation.

Quenching is a heat treatment process in which steel is heated to above a critical temperature, kept warm for a certain time, and then cooled at a cooling rate greater than the critical cooling rate, thereby obtaining an unbalanced structure mainly composed of martensite. Quenching is a metal heat treatment process which is the most widely applied work technology in a steel heat treatment process, and is a metal heat treatment process of reheating a quenched workpiece to a proper temperature, keeping the temperature for a period of time, and then cooling the quenched workpiece in air or a medium such as water, oil and the like, or heating an alloy workpiece to a proper temperature after quenching, keeping the temperature for a period of time, and then slowly or rapidly cooling the alloy workpiece, and is generally used for reducing or eliminating internal stress in the quenched steel part, or reducing the hardness and strength of the quenched steel part so as to improve the ductility or toughness of the quenched steel part. Tempering the quenched workpiece in time, and obtaining the required mechanical property by matching the quenching and the tempering;

the wind energy application prospect is very wide, the service life of the main shaft of the existing wind driven generator is not very long due to the influence of the surface roughness and the material thereof, and the main shaft is very troublesome to replace and very wasted.

Disclosure of Invention

The invention mainly solves the technical problem of providing a heat treatment process for a main shaft of a wind driven generator, which can reduce the cost of the heat treatment process and greatly prolong the service life of the main shaft under the condition of the same material and processing precision.

In order to solve the technical problems, the invention adopts a technical scheme that:

a heat treatment process for a main shaft of a wind driven generator comprises the following steps in sequence:

s1: hardening and tempering are carried out,

1) quenching and tempering: the main shaft is placed in a heating device to be heated to 650-700 ℃, the temperature is preserved for 40-50 min, and then the main shaft is placed in quenching and tempering liquid to be rapidly cooled.

2) High-temperature tempering: heating the main shaft to 500-540 ℃, preserving heat for 1.2-2 h, taking out, standing in the air, and naturally cooling.

S2: high-frequency quenching: and (2) heating the surface of the main shaft by induction heating equipment at the heating temperature of 900-1000 ℃, and then placing the main shaft into a constant-temperature quenching bath, wherein the cooling time of the main shaft in the quenching bath is 10-15 min.

S3: low-temperature tempering: heating the main shaft to 180-230 ℃, preserving heat for 1.5-2 h, standing in the air and naturally cooling.

Further, the heating device is a box-type resistance furnace.

Further, the quenching and tempering liquid is a water-soluble quenching liquid.

Further, the quenching medium in the quenching tank is water-based quenching liquid.

Further, after the air in step S3 is naturally cooled, a step of water cooling is further included, wherein polyethylene glycol, polyacrylamide and sodium chloride with the mass percentage of 5-6 wt% are added into water in the water cooling process.

Further, the heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: and (3) placing the main shaft into a heating device to heat to 650 ℃, preserving heat for 40min, and then placing the main shaft into quenching and tempering liquid to rapidly cool.

2) High-temperature tempering: heating the main shaft to 500 ℃, preserving heat for 1.2h, taking out, standing in the air, and naturally cooling.

S2: high-frequency quenching: and (3) heating the surface of the main shaft by induction heating equipment at the heating temperature of 900 ℃, and then placing the main shaft into a constant-temperature quenching bath, wherein the cooling time of the main shaft in the quenching bath is 10-15 min.

S3: low-temperature tempering: heating the main shaft to 180 ℃, preserving heat for 1.5h, standing in the air and naturally cooling.

Further, the heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: and (3) placing the main shaft into a heating device to heat to 675 ℃, keeping the temperature for 43 min to 5min, and then placing the main shaft into quenching and tempering liquid for rapid cooling.

2) High-temperature tempering: heating the main shaft to 520 ℃, preserving heat for 1.5h, taking out, standing in the air, and naturally cooling.

S2: high-frequency quenching: and (3) heating the surface of the main shaft by induction heating equipment at the heating temperature of 925 ℃, then placing the main shaft into a constant-temperature quenching bath, and cooling the main shaft in the quenching bath for 10-15 min.

S3: low-temperature tempering: heating the main shaft to 200 ℃, preserving heat for 2 hours, standing in the air and naturally cooling.

The invention has the beneficial effects that:

the main shaft of the wind driven generator prepared by the heat treatment process can reduce the cost of the heat treatment process, and can greatly prolong the service life of the main shaft under the condition of the same material and processing precision.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to be implemented according to the content of the description, the following detailed description is given of preferred embodiments of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

Example (b):

a heat treatment process for a main shaft of a wind driven generator comprises the following steps in sequence:

s1: hardening and tempering are carried out,

1) quenching and tempering: the main shaft is placed in a heating device to be heated to 650-700 ℃, the temperature is preserved for 40-50 min, and then the main shaft is placed in quenching and tempering liquid to be rapidly cooled.

2) High-temperature tempering: heating the main shaft to 500-540 ℃, preserving heat for 1.2-2 h, taking out, standing in the air, and naturally cooling.

S2: high-frequency quenching: and (2) heating the surface of the main shaft by induction heating equipment at the heating temperature of 900-1000 ℃, and then placing the main shaft into a constant-temperature quenching bath, wherein the cooling time of the main shaft in the quenching bath is 10-15 min.

S3: low-temperature tempering: heating the main shaft to 180-230 ℃, preserving heat for 1.5-2 h, standing in the air and naturally cooling.

The heating device is a box-type resistance furnace.

The quenching and tempering liquid is water-soluble.

The quenching medium in the quenching tank is water-based quenching liquid.

In this embodiment, after the air is naturally cooled in step S3, the method further includes a step of water cooling, wherein polyethylene glycol, polyacrylamide and sodium chloride are added to the water in an amount of 5 to 6 wt% during the water cooling process.

The heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: and (3) placing the main shaft into a heating device to heat to 650 ℃, preserving heat for 40min, and then placing the main shaft into quenching and tempering liquid to rapidly cool.

2) High-temperature tempering: heating the main shaft to 500 ℃, preserving heat for 1.2h, taking out, standing in the air, and naturally cooling.

S2: high-frequency quenching: and (3) heating the surface of the main shaft by induction heating equipment at the heating temperature of 900 ℃, and then placing the main shaft into a constant-temperature quenching bath, wherein the cooling time of the main shaft in the quenching bath is 10-15 min.

S3: low-temperature tempering: heating the main shaft to 180 ℃, preserving heat for 1.5h, standing in the air and naturally cooling.

The heat treatment process comprises the following sequential steps:

s1: hardening and tempering are carried out,

1) quenching and tempering: and (3) placing the main shaft into a heating device to heat to 675 ℃, keeping the temperature for 43 min to 5min, and then placing the main shaft into quenching and tempering liquid for rapid cooling.

2) High-temperature tempering: heating the main shaft to 520 ℃, preserving heat for 1.5h, taking out, standing in the air, and naturally cooling.

S2: high-frequency quenching: and (3) heating the surface of the main shaft by induction heating equipment at the heating temperature of 925 ℃, then placing the main shaft into a constant-temperature quenching bath, and cooling the main shaft in the quenching bath for 10-15 min.

S3: low-temperature tempering: heating the main shaft to 200 ℃, preserving heat for 2 hours, standing in the air and naturally cooling.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations and positional relationships that are conventionally used in the products of the present invention, and are used merely for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification, or any other related technical fields directly or indirectly, are included in the scope of the present invention.